Currently, no, as long as the purchase is not so large it'd trigger them filing an IRS currency transaction, which I think is $10,000. Some coin dealers want a name/address for their own internal records or mailing list, just shop around for another, if they do.
2) Is it feasible in this day and age to store one's numismatics at home where government police can use high tech machines to find it?
I think so, better if there in a house safe or good hidey hole, or 'midnight gardening' out back, rather than not taking physical possession of it or having in a safe deposit box, IMO.
3) Is there enough gold left in Ft. Knox to support returning to a gold standard or is the United States basically bankrupt?
I don't know.
-Shane
Because of the gold lease program, I seriously doubt if there is anything in the US Treasury vaults but a bunch of dusty IOU's. It is one of the dirty little secrets our government doesn't like to talk about. If there is a single dollar sitting around anywhere, the politicians will spend it. Just think social security "trust" fund. Nothing there either.
Richard W.